Bayonne is a city in the Basque Country region of southwest France, where the Nive and Adour rivers meet. Narrow medieval streets characterize the old Grand Bayonne district. Here lie the Gothic-style Bayonne Cathedral, with its 13th-century cloister, and Château Vieux castle. Across the Nive river in the Petit Bayonne district is the Musée Basque, a museum devoted to the region’s arts, crafts and traditions.